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Nrlnn ArnNr ISAAC C. GRAY, OF TIPPEOANOE, INDIANA, ASSIGNOR OFONE-FOURTH TO LORENZO D. ELY, OF SAME PLACE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 579,797, dated March30, 1897. Application tied January 4, 1897. serian). einen.` da model.)

To all whom t may concern: blocks t 4', consisting of substantial blocksBe it known that I, ISAAC O. GRAY, a citiof Vmetal or other suitablematerial adapted Zen of the United States, residing at Tippeto standsquarely and firmly on the bottom canoe, in the county of Marshall andState of of the housings or openings in which they are 55 5 Indiana,have invented certain new and usearranged and formed or provided withstems fullmprovementsin Elevators; and I do de- 5 5, serving asguide-stems for the coiled clare the following to be a full, clear, andexcushion-springs 6 6, arranged thereon with act description of theinvention, such as will their lower ends seated on theupper ends ofenable others skilled in the art to whiehit apthe blocks and theirupperends lodged against 6o ro pertains to make and use the same,reference the upper end of the housings or openings,

being had totheaccompanying drawings, and substantially as seen in thedrawings, the

to the letters and figures of reference marked object being to providebuffers to relieve the y thereon, which form a part of this speciiieajarwhich would otherwise occur on the sudtion. den engagement of thesafety-catches when 65 15 My invention has relation toimprovements thecarriage would suddenly descend.

in elevators; and the object is to provideasim- C O designate thesafety-catches, substanple, efficient, and reliable safety catch or griptially of the form shown in the drawings, pivfor vertically-moving andsuspended elevatoroted to the cushion-blocks, as at 7 and havcarriages,whereby when the suspension-caing their ends overlapped, as at 8, theunder- 7o 2o bles break orthe progress of the carriage is lapped endbeing formed with a suitable seat stopped by accidental causes it willbe auto- 8', in which the cable-link 9 engages. This matically preventedfrom descent by engagecable-link is of the usual form and is arrangedment of the catches in racks or ratchets on centrally and loosely aboutthe upper bar or the guides. rail of the frame. The catches C O are sup-75 2 5 I have fully and clearly illustrated my inported so that theircatch ends aline with the l vention in the accompanying drawings, rackson the guide-posts, and have an odset, whereinas at 10, made in them, soas to bring their Figure 1 is an elevation of thel carriagearms orstemsdirectly under and in alinement frame of an elevator having myimprovewith the cross-bar above them. In the arm 8o 3o ments appliedthereto. Fig. 2 is a detail side of each catch is iixed averticalguide-stud l1, view of the auxiliary catch and lever for enabout whichis arranged a buiier-spring 12, gagement with the rack and to throw thethe lower end ot' which rests on the arm of main catches into engagementwith the racks the catch and the upper end under and against in casethey are held by a partially slacked the top rail of the carriage-frame,substan- 8 5 3 5 or broken cable. Fig. 3 is a top or plan view tially asseen in the drawings, the springs actof the auxiliary catch and lever.ing to throw the catches down and into en- Referring to the drawings, AA designate gagement with the racks when the strain or the guidepostsfor the elevator carriage stress on the cable-link is slackened. frame,formed or provided with grooves or It will be perceived from theforegoing de- 9o 4o Ways l (indicated in dotted lines in Fig. 1)scription, taken inconnection with the drawand provided with racks orratchets 2 to be ings, that should the cable break the stress engaged bythe catches on the carriage, as on the catches will immediately berelieved hereinafter more fully specilied. and the force of thecompressed springs at B designates the frame which carries the once beexerted to move the arms of the 95 45 car or carriage. This frame iscomposed of catches downward and throw their catch ends vertical sidetimbers or pieces l' and bottom into engagement with the notches of theracks, and top pieces 2 2', all suitably secured toand thus stop thecarriage and hold it from gether, as usual. In the upper end portionsdescending farther. of the side pieces 1 are formed vertically- Foradditional security and to insure the roo 5o elongated openings 3 3', ofthe same size and action of the catches in any and all exigendimensions,wherein are disposed cushion cieswhere it may be required to bring theminto action I provide an auxiliary lever and catch of the followingconstruction: On the top rail of the carriage-frame is strongly secureda plate or bracket 13, formed with a downward-extending lug 13', towhich is fulcrumed a lever 14, so arranged that its inner and short armwill bear normally on the arms of the catches and having its outer andlonger arm extended adjacent to the rack, and has the end pivotallysecured to the buifenbloek, substantially as seen in the drawings. Thislever is pivoted or fulcrum ed in a slot formed in the depending'portion 13 of the lug 13, so as to have proper play to compensate forits requisite movements. To the outer end of the lever 14 is pivotallyhung a pawl or catch 15, the lower catch portion 15' of which is carriedinto alinement with the rack by means of a bend or offset 1G. To the armor stem of the catch 15 is rigidly secured a handle or lever 17,provided with a retractile sprin g 17 at its free end, the spring beingconnected to the arm of one of the main safety-catches, substantially asseen in the drawings, and to the outer end of the lever 17 is attached acord or rope 1S, designed to be let through the top of the carriage andbe manipulated by the operator. It will be perceived that if from anycause the main catches would fail to engage the racks when required todo so, by pulling on the rope 18 the catch 15 will be moved or swungoutward into engagement with the rack, which engagement will act to movethe buffer-block upward ,carrying there with the end of the lever 14C,causing the inner end thereof to bear on the arms of the main catchesand throw their catch ends into engagement with the racks and thus holdthe carriage securely against descent.

The operation may be stated as follows: Under ordinary action the pullon the cablelink holds all the catches out of engagement with the racks,but should the cable break or other accident occur which would cause thecarriage to descend the force of the springs on the arms of the catchescauses engagement with the racks and the force of the jar or stop beingcompensated for by the action of the springs on the buffer-blocks. Asheretolore stated, should the main catches fail to engage the racks apull on the rope connected to the handle of the auxiliary-lever catchwill effect the engagement and hold the carriage.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an elevator, a safety-catch device, comprising a carriage-frame,oppositely-disposed guides for the carriage formed with racks,buffer-blocks housed in the frame of the carriage, springs over thebuffer-blocks, safety-catches pivotally mounted on the buffer-blocks,and adapted to engage the racks and having their inner ends lapped,springs to throw the catches into engagement and a cable-link arrangedover the lapped ends of the catches.

2. In an elevator, a safety-catch device comprising a carriage-frzmie,oppositely-disposed guides for the carriage formed with racks,buffer-blocks housed in the frame of the carriage, springs over thebnffer-blocks, safetycatches pivotal] y mounted on the buffer-blocks,and adapted to engage the racks and having their inner ends lapped,springs to throw the catches into engagement and a cable-link arrangedover the lapped ends of the catches, an auxiliary lever f nlcrumed tobear with one end on the safety-catches, and its outer end connected toone of the bufferblocks, and a catch, having an actuatinghandle,pivotally suspended from the outer end of the auxiliary lever.

3. In an elevator, the combination with the guides having racks, mainsafety catches or levers, of an auxiliary safety device, comprising alever fulerumed to the carriageframe with one end arranged to bear onthe arms of the main safety-eatches, and a catcharm pivotally suspendedfrom the outer end of the said lever and having a catch portion adaptedto engage one of the said racks, and a handle on the catch-arm,substantially as set forth.

In testimony whereof I aix my signature in presence of two witnesses.

ISAAC C. GRAY.

Witnesses:

DAVID IIARRINGTON, S. C. BARRETT.

